Sopoaga, 32, was released by the Patriots back in March and has found no reported interest as a free agent. He signed with the Cardinals a little over a week ago and there was some talk that he could win a roster spot, but it appears as though Arizona could keep someone like Tommy Kelly instead.
The Patriots sent a 2014 fifth-round pick to the Eagles in return for Sopoaga and a 2014 sixth-round pick last year.
He would go on to appear in 14 games and total 12 tackles and a single sack. According to Pro Football Focus, he played just 120 snaps last year and was rated as a below-average defensive tackle.